RAM-Wiki

What does a memory designation such as 2S4Rx4 mean on a 128GB RAM? This is a RAM memory with 3DS memory technology. It was developed to produce larger memory module capacities than is possible with the available DRAM in the classic memory structure. The 3DS design achieves large memory capacities with high performance and reliable function. What distinguishes 3DS server memory from classic RDIMM or LRDIMM memory without the ‘3DS’ suffix?

Visually, an NVDIMM memory module is at first glance very similar to a DDR4 or DDR5 LRDIMM. The pinout of the NVDIMMs fits into the standardized DDR RAM memory slot. Access is also carried out directly by the processor via the fast system bus. However, the operation and purpose of an NVDIMM are completely different from regular working memory.

Systems with EPYC 7002 CPU can achieve a very good performance. On the other hand, only 25% of the maximum possible transfer rate on the memory bus is achieved with an unfavorable RAM configuration. We show which configurations are advantageous for you in our configuration table.